<template>
  <div>
      <ul>
          <li v-for="item in arr"> 
              {{item}}
          </li>
      </ul>
      <button @click="btn">走一走</button>
  </div>
</template>

<script>
export default {
    data () {
        return {
            arr:['帅哥','美女','程序员']
        }
    },
    methods: {
        btn(){
            this.arr.push(this.arr[0])
            this.arr.shift()
        }
    }
}
</script>

<style>

</style>